Electrode for ignition systems

US4393282A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Werner Grunwald · Gerlingen, DE
• Ernst Zehender · Calw, DE
• Karl-Hermann Friese · Leonberg, DE
• Jurgen Schmatz · Mundelsheim, DE
• Hans Neu · Leinfelden, DE
• Kuno Kirner · Gerlingen, DE
• Bernd Schumacher · Niederalteich, DE

Key dates

• Filing date: Mar 18, 1981
• Grant date: Jul 12, 1983
• Expiry date: Mar 18, 2001

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02P7/025
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The part of the distributor electrode in the breakdown region has a resistance of at least 400 ohms per millimeter. The total resistance of the electrode is in the range of between 0.5 and 1.0 kilo-ohms. The material is a mixture of a resistive ceramic material and a finely dispersed additive of metallic conductivity. Arrangements for creating surface discharge gaps thereby slowing down the sparking process and decreasing interference are also illustrated.